BoilerFaultCodesBaxi 3 flashes red Fault Code
Also written as 3FLASHESRED — same fault.
The Baxi 3 flashes red fault code means: your boiler is failing to light the gas or cannot stay lit, which means your heating and hot water have stopped working.. It appears on 11 Baxi models in our database.
Technical description: Ignition fault: No ignition, No flame detected following ignition, False flame signal detected, Repeated loss of flame detected
DIY fix possible
Check if other gas appliances, like a cooker, are working to confirm gas supply is activeCheck that your credit meter has not run out of fundsPress and hold the reset button for five seconds
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A cover plan would handle faults like 3 flashes red: no call-out fees, no surprise bills.
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Baxi models that show the 3 flashes red fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Baxi 3 flashes red fault code information on this page is sourced and cross-checked against the official Baxi service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026